Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
20
3.11. Assembling of the fixed contact of the earthing switch
The earthing switch type UN-4 is assembled to the disconnector type Mark-40. The assembly of it is taking pla-
ce during the assembly of the disconnector. Components and the method of assembling of the fixed contact
of the earthing switch is presented in the next drawing.
Used elements (the given quantities refer to a single ear-
thing switch):
1.
fixed contact of the earthing switch – 1 pc.
2.
corona ring of the earthing switch – 1 pc.
3.
spacer – 1 pc. *
4.
- screw M10x25 – 2 pcs.
- washer 10 – 4 pcs.
- spring washer 10 – 2 pcs.
- nut M10 – 2 pcs.
5.
- nut M16 – 4 pcs. (UN only)
- washer 17 – 4 pcs.
- spring washer 16 – 4 pcs.
6.
Pin M16x95 – 4 pcs.
* If only the UN earthing switch is assembled, the spacer
washer is also assembled under the movable contact
head of the disconnector. If only the UR earthing switch
is assembled, the spacer washer is assembled on the
driving insulator and supporting insulator of the fixed
contact head of current path.
